SAAB WIS ONLINE

(03-01-440) Fault/Reason code P0725 71 in TCM not in WIS

Symptom: The transmission warning lamp comes on in MIU. The message is displayed in SID. Limited shifting operation.

TECHNICAL ADVICE - Quick information for your help
Bulletin Nbr: 03-01-440
Date: ........... Januari 2003
Market: Alla
Fault/Reason code P0725 71 in TCM not in WIS

Cars affected

Saab 9-3 (9440) M03 equipped with automatic transmission.

Background

Diagnostic trouble code P0725 71 is not published in the latest issue of WIS (2002-3). Troubleshooting is published in the next issue of WIS.

When the diagnostic trouble code is generated in TCM, diagnostic trouble codes P0016, P0335, P0336, P0337 or P0339 exist in the engine management system.

Symptom description

The transmission warning lamp comes on in MIU.

The message is displayed in SID.

Limited shifting operation.



Procedure

Follow the diagnostic instructions below if the diagnostic trouble code arises.

Diagnostic instructions

Fault/Reason code

P0725 71

Fault/Reason code name

Engine speed. Bus data unreliable

Fault symptom

See above

On-Board Diagnosis

Type of diagnosis: Continuous

Input requirements: Engine running. The engine speed on the input shaft exceeds 500 rpm. No faults on bus communication with the engine management system. The Limp Home function is not active.

Fault criteria: The engine speed signal from the engine management system is invalid for more than 4 s.

System reactions in the event of a fault : Limp Home.

OK Report : The engine speed signal is valid for more than 5 min.

Diagnostic help

When the engine management system diagnostics have detected faults on the crankshaft position sensor and stored the diagnostic trouble code for this, the engine speed signal is invalid on the bus for the remainder of the driving cycle. When the diagnostic trouble code for the crankshaft position sensor is not active in the engine management system the correct value is sent out on the bus again. When P0725 71 is generated in TCM, diagnostic trouble codes P0016, P0335, P0336, P0337 or P0339 are already stored in the engine management system.

Follow the troubleshooting procedure for the current diagnostic trouble code in the engine management system.